第3题: [单项选择]医院感染暴发：是指某医院、某科室的住院病人中，短时间内 A. 突然发生许多医院感染病例的现象 B. 医院感染发病率显著超过历年散发发病率水平 C. 发现相同临床医院感染病例 D. 同时出现了3例以上医院感染病例 E. 医院感染病例数增加快，短期内不能控制 参考答案:A 答案解析:医院感染暴发：是指某医院、某科室的住院病人中，短时间内突然发生许多医院感染病例的现象。
第18题: [单项选择]{{B}}Questions 11 to 18 are based on the conversation you have just heard.{{/B}} A. Give the ring to a policeman. B. Wait for the owner of the ring in the rest room. C. Hand in the ring to the security office. D. Take the ring to the administration building. 参考答案:C 答案解析:[听力原文]
W: I found an expensive diamond ring in the rest room this morning.
M: If I were you, I wou
